Improvement in driving-wheels for harvesters



D. L. EMERSON,

Driving Wheel for Harvesters.

Patented Oct. 25, 1864,

UNITED STATES PATENT OFFICE.

DANIEL L. EMERSON, OF ROCKFORD, ASSIGNOR TO MARY MANNY, OF WINNEBAGOOOUN TY, ILLINOIS.

IMPROVEMENT IN DRIVING-WHEELS FOR HARVESTERS.

Specification forming part of Letters Patent No. 44,834, dated October25, 1864.

T0 mZl 1072,0721, it may concern.-

Be it known that I, DANIEL L. EMERSON, of Rockford, in the county of\Vinnebago and State of Illinois, have invented a new and use fulImprovement in the Driving-\Vheels of Harvesters; and I do herebydeclare that the following is a full and exact description of the same,reference being had to the accompany ing drawings, in which Figurelrepresents a side view of a (:lrivingwheel for aharvester constructedaccording to my invention, and Fig. 2 represents a trans verse sectionthrough the center of the same.

The driving-wheels of harvesters carry the main cog-wheel, which, by theturning of the driving-wheel, imparts motion to the acting members ofthe machine. Such wheels must be strong enough to withstand the strainincident to driving the cutting apparatus, raking apparatus, and reel ofthe machine. They must also have a certain weight toiusure their holdupon the ground; or, in default of this, a weight must be superimposedupon them. It is also desirable that they should not take up dirt on theinner sides of their rims, because the dirt so taken up is dropped intothe teeth of the cog-wheels to a greater or less extent, causing therapid wear of the parts and endangering their breakage.

My invention consists of a wheel having the above-named requisites, andyet requiring for its construction a less weight of iron than the weightwhich the wheel may weigh when it is at work upon the machine.

This wheel, as represented in the accompanying drawings, consists of ahub, A, spokes B. and a tubular rim, O, formed by casting the rim upon adry sand core properly vented and anchored in the mold. A wheel of thisconstruction has great strength in proportion to its weight of rim, andas it has a chamber, 101, in its rim 0, the wheel may be loaded byfilling the chamber with either sand or water, inserted through smallholes made in its walls, and securing it there by screwplugs until thetotal weight of the wheel and load in its chamber may be considerablygreater than the weight of iron of which the wheel is formed, so thatthe wheel obtains the requisite strength from the iron and the requisiteweight from the worthless material (sand or water) with which it isloaded. Moreover, as the wheelrim is very thick, it is hardly possiblefor it to be pressed deep enough into the dirt usually found inharvest-fields to permit loose dirt to fallinto its rim; and as theinner side of its rim is convex transversely. the dirt that mightaccidentallyget on thisinner side would glide outward as the rim rolledalong, so that the chance of dirt falling into the gearing isexceedingly small.

In constructing my wheel I prefer to cast the main cog-wheelD fast tothehollow rim of the wheel,which thus forms a strong base for thecogteeth, and as this base constitutes the wheel-rim, as well as thebase of the cog-teeth, the total weight of iron required for the coirstruction of the drivingwheel and cog wheel is considerably less thanwould be required for the construction of a driving-wheel and cog-wheelofequal strength, ifthe hollow wheelrim did not form the base of thecog-teeth.

Having thus described a harvester drivingwheel embodying myimprovements, what I claim as my invention, and desire to secure byLetters Patent, is

1. A harvester driving-wheel constructed with a tubular rim,substantially as set forth.

2. The combination of the tubular rim of the wheel with the cog-teeth ofthe main drivingwheel in such manner that said rim forms the base ofsaid teeth, substantially as set forth.

In witness whereof I have hereunto set my hand.

D. L. EMERSON.

\Vitnesses:

J. G. MnNLovE, E. K. OONKLING.

